diff options
Diffstat (limited to 'regressions/ck_epoch/validate/ck_epoch_synchronize.c')
-rw-r--r-- | regressions/ck_epoch/validate/ck_epoch_synchronize.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/regressions/ck_epoch/validate/ck_epoch_synchronize.c b/regressions/ck_epoch/validate/ck_epoch_synchronize.c new file mode 100644 index 0000000..a03a4f7 --- /dev/null +++ b/regressions/ck_epoch/validate/ck_epoch_synchronize.c @@ -0,0 +1,249 @@ +/* + * Copyright 2010-2015 Samy Al Bahra. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <errno.h> +#include <inttypes.h> +#include <pthread.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <strings.h> +#include <unistd.h> +#include <sys/time.h> + +#include <ck_backoff.h> +#include <ck_cc.h> +#include <ck_pr.h> +#include <stdbool.h> +#include <stddef.h> +#include <string.h> +#include <ck_epoch.h> +#include <ck_stack.h> + +#include "../../common.h" + +static unsigned int n_rd; +static unsigned int n_wr; +static unsigned int n_threads; +static unsigned int barrier; +static unsigned int e_barrier; +static unsigned int readers; +static unsigned int writers; + +#ifndef PAIRS_S +#define PAIRS_S 10000 +#endif + +#ifndef ITERATE_S +#define ITERATE_S 20 +#endif + +struct node { + unsigned int value; + ck_stack_entry_t stack_entry; + ck_epoch_entry_t epoch_entry; +}; +static ck_stack_t stack = CK_STACK_INITIALIZER; +static ck_epoch_t stack_epoch; +CK_STACK_CONTAINER(struct node, stack_entry, stack_container) +CK_EPOCH_CONTAINER(struct node, epoch_entry, epoch_container) +static struct affinity a; +static const char animate[] = "-/|\\"; + +static void +destructor(ck_epoch_entry_t *p) +{ + struct node *e = epoch_container(p); + + free(e); + return; +} + +static void * +read_thread(void *unused CK_CC_UNUSED) +{ + unsigned int j; + ck_epoch_record_t record CK_CC_CACHELINE; + ck_stack_entry_t *cursor; + ck_stack_entry_t *n; + unsigned int i; + + ck_epoch_register(&stack_epoch, &record); + + if (aff_iterate(&a)) { + perror("ERROR: failed to affine thread"); + exit(EXIT_FAILURE); + } + + ck_pr_inc_uint(&barrier); + while (ck_pr_load_uint(&barrier) < n_threads); + + while (CK_STACK_ISEMPTY(&stack) == true) { + if (ck_pr_load_uint(&readers) != 0) + break; + + ck_pr_stall(); + } + + j = 0; + for (;;) { + i = 0; + + ck_epoch_begin(&record, NULL); + CK_STACK_FOREACH(&stack, cursor) { + if (cursor == NULL) + continue; + + n = CK_STACK_NEXT(cursor); + j += ck_pr_load_ptr(&n) != NULL; + + if (i++ > 4098) + break; + } + ck_epoch_end(&record, NULL); + + if (j != 0 && ck_pr_load_uint(&readers) == 0) + ck_pr_store_uint(&readers, 1); + + if (CK_STACK_ISEMPTY(&stack) == true && + ck_pr_load_uint(&e_barrier) != 0) + break; + } + + ck_pr_inc_uint(&e_barrier); + while (ck_pr_load_uint(&e_barrier) < n_threads); + + fprintf(stderr, "[R] Observed entries: %u\n", j); + return (NULL); +} + +static void * +write_thread(void *unused CK_CC_UNUSED) +{ + struct node **entry, *e; + unsigned int i, j, tid; + ck_epoch_record_t record; + ck_stack_entry_t *s; + + ck_epoch_register(&stack_epoch, &record); + + if (aff_iterate(&a)) { + perror("ERROR: failed to affine thread"); + exit(EXIT_FAILURE); + } + + tid = ck_pr_faa_uint(&writers, 1); + ck_pr_inc_uint(&barrier); + while (ck_pr_load_uint(&barrier) < n_threads); + + entry = malloc(sizeof(struct node *) * PAIRS_S); + if (entry == NULL) { + ck_error("Failed allocation.\n"); + } + + for (j = 0; j < ITERATE_S; j++) { + for (i = 0; i < PAIRS_S; i++) { + entry[i] = malloc(sizeof(struct node)); + if (entry == NULL) { + ck_error("Failed individual allocation\n"); + } + } + + for (i = 0; i < PAIRS_S; i++) { + ck_stack_push_upmc(&stack, &entry[i]->stack_entry); + } + + while (ck_pr_load_uint(&readers) == 0) + ck_pr_stall(); + + for (i = 0; i < PAIRS_S; i++) { + ck_epoch_begin(&record, NULL); + s = ck_stack_pop_upmc(&stack); + e = stack_container(s); + ck_epoch_end(&record, NULL); + + if (i & 1) { + ck_epoch_synchronize(&record); + ck_epoch_reclaim(&record); + ck_epoch_call(&record, &e->epoch_entry, destructor); + } else { + ck_epoch_barrier(&record); + destructor(&e->epoch_entry); + } + + if (tid == 0 && (i % 16384) == 0) { + fprintf(stderr, "[W] %2.2f: %c\n", + (double)j / ITERATE_S, animate[i % strlen(animate)]); + } + } + } + + ck_epoch_synchronize(&record); + + if (tid == 0) { + fprintf(stderr, "[W] Peak: %u (%2.2f%%)\n Reclamations: %lu\n\n", + record.n_peak, + (double)record.n_peak / ((double)PAIRS_S * ITERATE_S) * 100, + record.n_dispatch); + } + + ck_pr_inc_uint(&e_barrier); + while (ck_pr_load_uint(&e_barrier) < n_threads); + return (NULL); +} + +int +main(int argc, char *argv[]) +{ + unsigned int i; + pthread_t *threads; + + if (argc != 4) { + ck_error("Usage: stack <#readers> <#writers> <affinity delta>\n"); + } + + n_rd = atoi(argv[1]); + n_wr = atoi(argv[2]); + n_threads = n_wr + n_rd; + + a.delta = atoi(argv[3]); + a.request = 0; + + threads = malloc(sizeof(pthread_t) * n_threads); + ck_epoch_init(&stack_epoch); + + for (i = 0; i < n_rd; i++) + pthread_create(threads + i, NULL, read_thread, NULL); + + do { + pthread_create(threads + i, NULL, write_thread, NULL); + } while (++i < n_wr + n_rd); + + for (i = 0; i < n_threads; i++) + pthread_join(threads[i], NULL); + + return (0); +} |